Here is my simple structure to protect young seedlings from getting consumed by my little garden friends. To take it off I can just lift it up. Here I am starting some sunflowers in a potato sack.
They are are measured to just fit on top of my bins where I can fasten whatever I want to them. On the back side of the swiss chard are snap peas. I haven’t been able to grow them because the birds eat all the leaves leaving nothing but a bare stem. This will protect them and provide something for the vine to crawl on.
Here are my senorita peppers seedlings next to the bush basil. I started them indoors under a glow panel. I am going to let them hardy up outside for a little bit and then transplant. Before when I did this the plants were gone in less than an hour. Hopefully this structure will give them a fighting chance. Picture below is from when I was growing them indoors.